Duluth is a city located in northeastern Minnesota, on the westernmost point of Lake Superior. It is known as the "Gateway to the Great Lakes" and is a major port for freight transportation. The city's port is the largest on the Great Lakes, handling over 35 million tons of cargo annually. Duluth's strategic location on Lake Superior has made it a hub for shipping goods such as iron ore, coal, grain, and timber.

The history of freight transportation in Duluth dates back to the late 19th century when the city became a key player in the iron ore industry. The discovery of vast iron ore deposits in the Mesabi Range, located just west of Duluth, led to a boom in mining and shipping. The city's harbor was expanded to accommodate larger ships, and railroads were built to transport the iron ore from the mines to the port. Today, Duluth continues to be a major center for the shipping industry, with a diverse range of cargo passing through its port.

Joliet is a city located in Will County, Illinois, and is the county seat. It is the third largest city in the state, with a population of over 147,000 residents. The city has a rich history, dating back to the 1830s when it was first settled. Joliet became a major transportation hub in the late 19th century, thanks to its location along the Des Plaines River and the Illinois and Michigan Canal. The city's proximity to Chicago and its access to multiple railroads made it an important center for freight transportation.

One of the most notable features of Joliet's transportation infrastructure is its extensive network of railroads. The city is served by several major rail lines, including the Union Pacific and the BNSF Railway. Joliet's railroads played a crucial role in the city's development as an industrial center, allowing for the easy transportation of goods and materials. Today, the railroads continue to be an important part of Joliet's economy, with many businesses relying on them for shipping and receiving goods.